The diameter of a ball bearing was measured by an inspector using a new type of caliper
Chapter 9, Problem 9-115(choose chapter or problem)
The diameter of a ball bearing was measured by an inspector using a new type of caliper. The results were as follows (in mm): 0.265, 0.263, 0.266, 0.267, 0.267, 0.265, 0.267, 0.267, 0.265, 0.268, 0.268, and 0.263. (a) Use the Wilcoxon signed-rank test to evaluate the claim that the mean ball diameter is 0.265 mm. Use 0.05. (b) Use the normal approximation for the test. With 0.05, what conclusions can you draw?
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